The Arrowie Area is situated in the Central Flinders Ranges and constitutes the southeastern corner of COPLEY (i.e. 1:250 000 sheet). Approximately 50% of the area is mantled by Cainozoic sediments distributed in part of the western edge of the Frome Embayment and in a small basin within the Flinders Ranges which is linkied to the Embayment further to the south. The area is drained by two main creeks - Mount Chambers and Teatree creeks, both of which flow eastwards into Lake Frome. The geology of the Arrowie area has previously been described by Horwitz (1962). Revisional mapping on a 1:250 000 scale was commenced and completed in 1969 by R. Callen, R. Coats and T. Williams. The Cainozoic sediments were mapped by Williams with contributions by Coats and Callen. R. Callen (1970 and 1969) has described the structure of the Arrowie fault zone and has written notes on Tertiary deposits near Ironstone bore. Bore logs provided some information on subsurface stratigraphy in the Frome Embayment. The author wishes to thank Dr. H. Wopfner and Mr. J.B. Firman for the hopeful advice they have given concerning various aspects of the stratigraphy. He is grateful to Mr. R. Coats and Mr. R. Callen who critically read this text.